Observation of $D^0\text{-}{\overline{D}}^0$ Mixing in $e^{+}{e}^{-}$ Collisions

Journal Article · Mon Mar 17 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.112.111801· OSTI ID:1594458

Ko, B. R.; Won, E.; Adachi, I.; Aihara, H.; Arinstein, K.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bala, A.; Bhardwaj, V.; Bhuyan, B.; Bobrov, A.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chen, A.; Cheon, B. G.; Chilikin, K. ; Chistov, R.; Cho, I. -S.; Cho, K.; Chobanova, V.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Doležal, Z.; Drásal, Z.; Dutta, D.; Dutta, K.; Eidelman, S.; Epifanov, D.; Farhat, H.; Fast, J. E.; Ferber, T.; Gaur, V.; Ganguly, S.; Garmash, A.; Gillard, R.; Glattauer, R.; Goh, Y. M.; Golob, B.; Haba, J.; Hara, T.; Hayashii, H.; He, X. H.; Higuchi, T.; Hoshi, Y.; Hou, W. -S.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Iwashita, T.; Jaegle, I.; Julius, T.; Kawasaki, T.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, J. H.; Kim, M. J.; Kim, Y. J.; Klucar, J.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Lee, S. -H.; Li, J.; Li, Y.; Libby, J.; Liu, C.; Liu, Z. Q.; Lukin, P.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mohanty, G. B.; Moll, A.; Mussa, R.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Nayak, M.; Nedelkovska, E.; Nisar, N. K.; Nitoh, O.; Ogawa, S.; Okuno, S.; Pakhlova, G.; Park, C. W.; Park, H. K.; Pedlar, T. K.; Peng, T.; Petrič, M.; Piilonen, L. E.; Ritter, M.; Röhrken, M.; Rostomyan, A.; Ryu, S.; Sahoo, H.; Sakai, Y.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Seidl, R.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Shwartz, B.; Sibidanov, A.; Simon, F.; Singh, J. B.; Sohn, Y. -S.; Sokolov, A.; Stanič, S.; Starič, M.; Steder, M.; Sumiyoshi, T.; Tamponi, U.; Tatishvili, G.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vahsen, S. E.; Van Hulse, C.; Vanhoefer, P.; Varner, G.; Vinokurova, A.; Vorobyev, V.; Wagner, M. N.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, Y.; Yamamoto, H.; Yamashita, Y.; Yashchenko, S.; Yook, Y.; Zhang, C. C.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.

In this work, we observe $D^0\text{-}{\overline{D}}^0$ mixing in the decay $D^0\to K^{+}{\pi }^{-}$ using a data sample of integrated luminosity $976{\mathrm{fb}}^{-1}$ collected with the Belle detector at the KEKB $e^{+}{e}^{-}$ asymmetric-energy collider. We measure the mixing parameters ${x^{\text{'}}}^2=(0.09\pm 0.22)\times 10^{-3}$ and $y^{\text{'}}=(4.6\pm 3.4)\times 10^{-3}$ and the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates $R_D=(3.53\pm 0.13)\times 10^{-3}$, where the uncertainties are statistical and systematic combined. Our measurement excludes the no-mixing hypothesis at the 5.1 standard deviation level.

• Research Organization: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: SC0009973
• OSTI ID: 1594458
• Journal Information: Physical Review Letters, Vol. 112, Issue 11; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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